According to the UFO lore,
the following are the main points I have come across while doing recent research:

1. Detonation of first nuclear device attracted the attention of the current UFO visitors. Good guys, who look like us, come from somewhere in the Pleides.
Bad guys are a reptilian race from Zeta Reticuli, who have "manufactured" the greys to do their dirty work.

2. Alien craft are powered by Ununpentium, element 115, which does not occur naturally on earth.
Works on counteracting earth gravity, by generating it's own gravity field/wave which can be focussed/directed for propulsion.
Very high voltages involved hence the halo/glow seen on reported UFO's while in our atmosphere.

3. Good guys met Dwight D. Eisenhower late 1940's, concerned over nuclear arms race, offered him free energy if he backed off. He declined for fear of the Russian threat. He later made a deal with the bad guys for more arms technology in exchange for human guinea pigs, the whole abduction deal(apparently they have some reproductive issues, maybe they need Viagra), and a base for them on earth, currently at S4. This was funded by the sale of pharmaceuticals, drugs. I think the aliens threw in some element 115 for a sweetner. What he didn't know, bad guys also made the same deal with the Russians. Eisenhower and all subsequent Presidents lost control at this point as the military took over and the era of black ops was born.

4. Americans found out they could upset the propulsion system of saucer craft with a strong electromagnetic pulse by using modified radar.
Consequently captured some, back engineered them at area 51 and s4, and now have their own version of saucer called an alien reproduction vehicle.
These are operated from S4.

5. All aliens refer to us as containers, as we have 53 genetic corrections carried out by former visitors over 10's of thousand of years.

5a.Some aliens envy us, we have a spirit/soul, they don't.

6. There are alien bases/ruins on the moon and mars.
Observation areas while they were doing their genetic corrections on us.

7. NASA were "warned" off the moon, hence no return visits for decades.
Moon pictures that public have access to, including those from Clementine, have been doctored(air-brushed/Photoshopped) to obscure alien bases/ruins/towers.

8. USA are not spending huge money on a shuttle replacement as they have vastly greater technologies buried in black ops.

9. Stargate type technology exists at S4. Story told about US official told to dress in clothes for warm weather, arrived at S4, went through a door, and came out at a military base in Australia, instantaneously.

10. There are many high tech underground tunnels linking secret bases.

11. Apparently, all earthly religions are a bunch of hoo-hah, men being enslaved by men.

12. There is something comparable to "The Force" which eminates from all living things. Good guys contribute to it, bad guys feed on it. Did George Lucas know something?

13. Intense security surrounds those who currently deal with this in the US of A, with people knowing only what they need to know to do what they do. Very few are privvy to the big picture. Any dishonesty or whisleblowing is dealt with harshly, one method is implanting agressive cancer cells in the brain.
Security guards watch security guards with a rapid turnover of personnel, many go missing after their tour of duty, personnel are picked that are free from spouses, family or other attachments. The Commander in Chief apparently knows very little as he is of civilian origins and does not have the necessary clearances. Apparently G. Bush Senior when involved with the CIA, denied Carter access to black ops. Clinton was also refused. So who is running the show???????

14.New age prophets/contactees have popped into existance and have a loyal following, Alex Collier, Jim Nichols, Richard Hoagland for example.

15.Good guys also met the Pope at the Vatican around the same time as Eisenhower, but instead of absorbing what they had to say, he attempted to indoctrinate the alien heathens into the ways of the Catholic Church, and as this failed, little became of it.

15a.Eisenhower was Succeeded by John F. Kennedy, and while folk generally think he was assassinated for a multitude of reasons, the "real" reason was that he was going to expose the whole nasty alien business to the world. Plus, his sometime bed partner Norma Jean Marilyn Monroe Baker got a cocktail of barbiturates pumped up her nether regions to keep her quiet, permanently.

16.The internal combustion engine has been obsolete for 50yrs+, but persists to maintain petrodollars.

16a.The reason contemporary reports of UFO's traversing the sky seem to bob about is due to the fact that, while the phase shifted gravitational field produced by the craft is stable, the opposing field produced by the earth is not, due to the constituents of the crust/mantle/core as the saucer moves(not flies) over the landscape.

17.Mammals and reptiles it seems are not destined to be good friends, this goes back to the garden of eden in our culture and beyond in alien culture.

18. Most importantly, Steven Greer of the Disclosure Project & Cseti has announced this year, 2010, that unless Obama brings all this black op stuff concerning aliens out into the public domain before the end of the year, he and his followers of scientists and military witnesses will do it, this time with incontrovertible proof, presented to a world stage.

Google "The day before disclosure 2010"

More on element 115 and gravity propulsion technology,
and a really nice pic of one of Bob Lazar's saucers(sport-model)......

I am always skeptical of sources of information that seem to have all the answers, or even just too many answers, especially in matters as uncertain as UFOs. Atom bomb detonations in the 40's may have made us more conspicuous at stellar distances, but the idea that a civilization exists around a star(s) of the Pleiades star cluster appears highly doubtful, despite all the claims to the contrary. Its stars appear to be too young to have evolved stable planets. It is unclear why a malevolent race capable of traversing stellar space would need to strike a bargain with the U.S. government. They would presumably be able to act with impunity and as they pleased, without our permission or cooperation. Steven Greer has already had his witnesses tell their amazing stories, more than once. Little seems to have come of it. If he now has new information that will provoke a different reaction, he should reveal it without further delay. Michael

I agree Michael about the Pleiades, a young star system just a few 100 million years old. The story tellers have this covered though in that in may not be their place of origin and have migrated there from somewhere else conveniently.

If a tiny amount of the above turns out to be true,
there will be amazing times ahead.
One of the sites claimed that in the very near future,
it would appear as if we were characters in a science fiction movie,
such were the tecnological peaks that humans have attained covertly,
and should be relealed to all.

If Greer and his witnesses turn out to be charlatans, or misguided,
it brings into question their motives.
Some of them very definitely believe what they are saying,
and if my knowledge of body language is up to speed,
they are convinced they are correct.

100 million year old planets would be very unlikely to be hospitable to complex forms of life. Earth apparently wasn't, at that age, or for a very long time thereafter. Planetary engineering can't be ruled out, but why bother if, as seems likely, there are numerous more hospitable planets? Michael

Atomic detonations in the 40's, would put the signal about 70 light years out. If the aliens are 35 light years out, and they immediatly got in their ship and headed here, they would just be getting here. Thirty five light years is not that far, so you are only talking about a few stars.

Radio transmissions of a high enough frequency to not be either absorbed or reflected back to to Earth by the ionized layers of our atmosphere are considerably less than 100 years old. ~ 75 years; early radar and medium definition television. It isn't altogether clear to me that a really advanced civilization couldn't find some means of working around the light speed limit, both in travel, and communication. If so, they might have a means of relaying our light-speed signals, including gamma and x-rays from atomic bombs, from some point in or near this solar system to their own in less time than expected, and of arriving here with similar rapidity. Michael

In trying to understand alien technology, we are trying to anticipate what our own scientists may discover in the realm of physics in the future. We have come a long way in the last 150 years. My own grandparents would never have believed how modern people in the developed societies live today, the standard of living which we, by and large, take very much for granted.

Advanced Alien races 1000's of years more advanced than us are likely to have solved many issues we deem as insolvable.
Advanced Alien races millions of years more advanced than us may have science and a way of life that is beyond our understanding.

The current fascination with us is that our planet may be rare, a jewel among jewels, so to speak, and benevolent races may be here in a caretaker capacity.
They have already proven that they can render underground missile launch sites inoperable. There is one very secret high speed military film showing them intercepting a high speed ballistic missile launch test at high altitude and destroying the war head with a beam, clearly caught on film, 100% authentic.

The alien phenomenon is real, it is here, and most of what we say will be supposition until the whole thing is brought out into the open either by them, or whistleblowers.

I have heard the reports of alien encounters. It would seem more plausable to me that if a government wanted to experiment with someone, they could easily make the person think they were being abducted, and could then do what ever they wanted because who is going to believe the person when they say aliens tested them. A good magician can make people think they see something, but it is clearly not what is happening. Chris Angel is a great example. I have seen many of his illusions, and although I have figured out a few of them, I don't have a clue about what is really happening with most of them. By using similar techniques, governments could opperate without impunity, and do more or less what ever they wanted. Science is about observation. We have looked at the universe in different wavelengths, and have discovered more about the nature of it. More discoveries are sure to follow. Science works within those observations, and self corrects to get a better picture of what is happening. If you base opinions on situations that are not based on observations, then you are free to say or think anything you want whether real or not. It really doesn't matter at that point. Observations can be tested for validity, and theories about the observations can either be confirmed, modified, or disregarded. This is just my opinion, and can be changed as theories about observations get closer to reality. I too can self correct, but I can't jump to an unsupported conclusion based on a maybe.

Enrico Fermi informally posed his famous paradox, ending in 'where are they'? in 1950. He had considered the likelihood that life arose with reasonable frequency in the galaxy and in some cases resulted in intelligence and civilizations. He realized that this had been going on for a very long time, long enough to allow these races to travel and establish themselves throughout the galaxy, even if they were limited to speeds well below that of light. It was quite reasonable to ask why we do not see evidence of their presence. Paradoxes usually indicate that we have not understood a situation fully. That may well be the case here. It may seem that evidence for the presence of extraterrestrials is lacking, but what if this is not the case? What if this is merely a misconception? Michael

Enrico Fermi informally posed his famous paradox, ending in 'where are they'? in 1950. ... Paradoxes usually indicate that we have not understood a situation fully. ... What if this is merely a misconception? Michael

On earth, heavy elements with atomic numbers greater than 94 are unstable, they decay with varying lengths of half-life. Generally speaking, the heavier the element, the faster the half-life decay time. Its very difficult to synthesise these very heavy elements and by the time you get as high as element 115, the half-life is very tiny, milliseconds. The element is incredibly unstable. Because of this, element 115 is NEVER going to be used for anti-gravity. Not now, and not in a thousand years from now. If you understood exactly why this is true, then you would know why the science you have suggested is never going to be possible with element 115. The science on this website is NEVER going to be possible; http://www.zamandayolculuk.com/cetinbal/GRAVITYR.htm

Honestly, there are many possibilities far into the future for people developing the science of anti-gravity, but its not going to happen with elements heavier than uranium(92) or plutonium(94).

And Steven Greer will do anything and say anything to sell more of his books.